D-H

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Data Definition Language

The statements that describe the metadata definitions.

Data Manipulation Language

The statements that allow data in a SQL Server database to be stored, retrieved, modified, or deleted.

Data Transformation Services (DTS)

A SQL Server data pump that allows data to be imported or exported from SQL Server while being scrubbed or massaged.

Database

A collection of data which usually more than one user can access at the same time. The database maintains its own data integrity and security. There can, and typically will be, be a number of databases per SQL Server.

DCOM

Distributed version of COM. Permits COM applications to communicate between different physical servers.

Distributed iNternet Architecture (DNA)

A multilayered approach to software design architecture created by Microsoft. By using a DNA approach, developers separate the user interface from the business logic and database store.

Distributed Transaction Coordinator (DTC)

A tool that manages transactions across multiple SQL Servers.

DNA

See Distributed iNternet Architecture.

DTD

Document Type Definition. Describes how tags and nesting levels may be used in an XML document.

EAI

Enterprise Application Integration. The process of linking different IT systems together, often with difficult-to-manage interfaces.

EDI

Electronic Data Interchange. Industrywide standard for sending inter- company business data.

EDIFACT

Electronic Data Interchange for Administration, Commerce, and Transport. An EDI standard.

EDI850

An EDI-based standard for data interchange.

Embedded SQL

SQL code that is embedded in an application and precompiled before execution.

GXA

Global XML Architecture. An IBM and Microsoft initiative to improve standards around Web Services.

Hash Value

The result of applying a cryptographic hash function to a piece of data.

HTTP

HyperText Transfer Protocol. An Internet standard protocol for connecting systems across the World Wide Web.

HTTPS

HyperText Transfer Protocol/Secure. A secure version of HTTP (qv).

HTML

HyperText Markup Language. A format used to publish documents on the World Wide Web.

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